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Re: low temperature physics



Or you may wish to Google "adiabatic demagnetization"

for example:
<http://imagine.gsfc.nasa.gov/docs/teachers/lessons/xray_spectra/background-
adr.html>
<http://www.britannica.com/nobel/micro/5_46.html>
<http://www.janis.com/p-adr.html>

Larry Woolf
General Atomics
3550 General Atomics Court
Mail Stop 78-110
San Diego CA 92121
Ph:858-526-8575
FAX:858-526-8568
http://www.ga.com
http://www.sci-ed-ga.org


-----Original Message-----
From: John S. Denker
Sent: Thursday, October 23, 2003 7:15 AM
Subject: Re: low temperature physics

On 10/23/2003 08:48 AM, Tim O'Donnell wrote:
How does one magnetical cool below 1K?

Using a spin system.
The quantity magnetization times applied magnetic field
enters the thermodynamics exactly the same way as pressure times volume
would.
The basic story goes something like this....